Electric regulation.



L L. CREVELING. ELECTRIC REGULATION. APPLICATION min JULY 21.19. men/:0 SEPT. I9. ma.

1 ,301 ,23 1 Patented Apr. 22, 1919.

INVENTOR JOHN L. OREVELING, OF NEW YORK, N. Y.,

ASSIGNOR TO SAFETY CAB. HEATING AND LIGHTING COMPANY, A CORPORATION OF N EW JERSEY.

ELECTRIC REGULATION.

Application filed July 21, 1911, Serial No. 639,743.

T 0 all whom it may concern Be it known that I, Join: L. CREVELING, a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Regulatioh, as set forth in the annexed specification and drawing forming a part thereof.

My invention pertains to that class of electric regulation wherein it is desired to regulate an electric circuit in a predetermined manner and has for its particular object to provide means whereby such a circuit may be automatically governed. As my invention is particularly applicable to systems wherein it is desired to hold constant the voltage upon a translating circuit fed from a source of variable electromotive force, it will be described with reference to such a system.

The drawing is a diagrammatic representation of one type of system embodying the essentials'of my invention.

In the drawing 1 represents a dynamo or generator which is suitably governed in any proper manner and from which the positive lead 2 is carried to the positive side of the storage battery 3 and lamps or other translating devices indicated at 4. The translating devices have their negative terminals connected with the main 5 which is in electrical communication with the conducting member 6 carried bythe insulating backplate 7. The conducting member 6 is in contact with one end of the carbon pile 8 thelother end :of which is in electrical communication with the contact member 9 carried by the screw 10 and insulated therefrom as by the bushing 11. The screw 10 is carried by the arm 12 which in turn is carried by the armature 13 supported by the stud 14.of non-magnetic material carried by the ma net frame, or shell, 16, attached to the bacli-plate 7 as by screws 22. The armature 13 is, normally pressed in a righthanded direction by the compression sprin Hand its travel'in this direction is limite by thenuts 15. The contact member 9 is electrically connected as by the wire .18 with a likecontact member cqmmunicating with one end. (if the carbon pile 19, arranged in the same manner as the carbon ile 8 above described. The op osite endof the carbon pile" 19 is connected as by the lead 20 with thenegative side of the Storage battery 3 aide =01 the generat s-.1.

Specification of Letters Patent.

Patented Apr. 22, 1919. Renewed September 19, 1918. Serial No. 254,865.

21 is a coil having one end connected with the lead 20 as by the wire 23 and having the opposite end connected with the wire 24 which is in communication with the contact member 25 and the adjustable contact screw 26. The contact member 25 is carried by the screw 27 which is insulated therefrom as by the bushing 28. The said screw is carried by the armature 13 and thus the contact member 25 travels with the armature 13. The contact member 25 is in electrical communi cation with one end of any well known current "crying means, as a small carbon pile 29, the opposite end of which is in contact with the adjustable contact member 30 which is electrically connected with the wire 31 which is led through the resistance 32 to the lead 2 and also carried to the contacting lever 33. 34 is a coil upon the magnet frame 16 having its magneto-motive force opposed to the coil 21 and has one end connected with the lead other end connected with the adjustable contact screw 36 as by the wire 37. The lever 33 is provided at one extremity with a core of magnetic material 38 surrounded by the solenoid 39 in shunt across the translation circuit which solenoid tends to lift the core 38 when excited. 40 is an adjustable spring tending to oppose the action of solenoid 39.

The operation of my invention is substantially as follows:

If the generator be running and supplying current to the lamps or translating de' vices, current will flow from the generator 1 through the lead 2, battery 3 and return to the generator through the lead 20 Also, from the lead 2 through the translating devices 4, main 5, conducting member 6, carbon pile 8, contact number 9, wire 18, carbon pile 19 and lead 20 to the generator, and it will be obvious that the voltage upon the translating devices 4 may be governed by means of the carbon piles 8 and 19, the resistance of which will depend upon the pressure applied thereupon. Current will also flow from the lead 2 through wire 31 and interposedresistance 32 to the adjustable contact member 30, then through carbon pileuor current varying-means 29 and wire 24 to coil 21 and wire 23 to thelead 20. This current will excite the electromagnlet 16-721 and cause the same to attract thearmature 13 against the action of spring 17. andexert pressure upon the carbon piles 8 and 19 and .end talouer the raetetaneeihe e will 20 as by the wire 35 and the.

rise slightly be obvious that as the pressure upon the car bon piles 8 and 19 is increased the pull of the magnet 16-21 must necessarily be increased to produce said pressure. Also, that as the pressure upon the carbon piles is increased the armature 13 will travel toward the magnet frame 16 so as to increase the pressure upon the piles. Motion of the armature 13 will cause the contact member 25, adjustable as by the screw 27, to move with the armature 13 and, as the armature 13 is moved toward the magnet frame, to increase the pressure upon the piles 8 and 19, the resistance of the pile 29 will also be lessened. I so adjust the pile 29 that its resistancc will decrease and increase the current in the coil 21 in such proportion with respect to the pressure exerted upon the iles 8 and 19 by movement of the armature 13 that if the armature 13 be forced into any position within its range, the magneto-mo tive force of the coil 21 will be so dimensioned as to retain the armature 13 in this position. In other words, there is a balance between the pull of the magnet 21-46 and the pressure exerted against the Miniature 13 in the opposite direction by the piles 8 and 19 and spring 17 The proper position of the armature 13 and, therefore, the proper pressure upon the carbon piles is determined the following manner: The solenoid 39 receives current from the translation circuit and measures the voltage thereof, as it is in shunt thereto, and I so adjust the spring 40 that when the desired voltage is reached across the translation cir cuit, the lever 33 stands in the position shown in the drawing. If now the voltage fall slightly, the solenoid 39 will allow the spring 40 to swing the lever 33 into contact with the screw 26 and thus the resistance 29 willbe short-circuited in an obvious manner, and'the pull of the magnet 16-21 greatly increased'and the pressure upon the carbon pi1cs8 and 19 increased until the voltage across, the translation circuit is brought to the nor-maland the lever 33 drawn into its normal position indicated in the drawing. If the voltage across the translation circuit above the normal, then the solenoid 39 wil raise its core 38 and swing the lever 33 into contact with thescrew 36, and current will flow through the wire 31, lever 33, contact screw 36, wire 37, coil 34 and wire 35 to the lead 20, and this current will cause the magneto-motive force of the coil 34, o posing the magneto-motive force of the coi -21, to weaken the resultant magnote-motive force of the elctromagnet, and allow t e armature; 13' to niove away from the magnet framelt and decrease the presupon the piles 8 and 19 and increase the resistiince thereof until the voltag'd upon the translation circuit is brou ht down to, the normal and the lever 33 allowed to re ume its normal position.

I do not wish in any way to limit myself to the exact details of construction or exact mode of operation set forth in this specification and drawing which are given to show one type of system embodying the essentials of my invention, for it will be obvious that wide departure may be made in the matter of details without departing from the spirit and scope of my invention which is as set forth in the following claims:

1. A circuit comprising a .regulator; means associated with said circuit for actuating the regulator; a varying device connected with said means, means for actuating the regulator in opposition to the first named means; a controlling element in said circuit; and connections associated with said varying device and said second mentioned means for enabling the efi'ect of said varying device to be nullified and said second mentioned means to be energized.

2. An electric circuit comprising a regulator; a coil associated with said circuit for operating the regulator; a variable resistance in series with said coil; and a second coil in multiple relation with the first coil and adapted to oppose the efi'ect thereof; a voltage responsive element in said circuit; and connections controlled by said element for nullifying the eiiect of said resistance; and connecting said second coil to the circuit to be energized according to conditions in said circuit.

3. A circuit comprising a regulator; a coil associated with said circuit; an armature adapted to be attracted by said coil for actuating the regulator; a variable resistance connected with said coil; means carried by said armature for affecting said resistance; a voltage responsive element connected to said circuit; and connections controlled thereby for nullifying the effect of said variable resistance.

4. A circuit comprising a re ulator; a coil connected across said circuit or actuating the regulator; a variable resistance in series with said coil; a second coil in multiple relation with the first coil for opposing the effect of the same; a short-circuit :for' said resistance; a switch adapted to be operated to close said short-circuit when moved in one direction, and to close the circuit of the other coil when moved inthe other direction, and a volta e responsive element for actuating th'eswi ch. w

JOHNL CREVELING.

Witnesses:

. CHAS. MGCHAPMAN, ANNA MARIE WALL.

came: of um patent may-11 mam mare other e'ach, by utmost: the "Commissioner 0! ream,

v Washington, D. 0." 

